Game rules help

Seems to me roll20 is essentially rule-agnostic, in the sense that allows you to do visualization of any D&D-type game, but doesn't help you (either player or GM) to execute the rules. Wouldn't it be nice (for GMs) to be able to define such rules?

The goal is very much to be rule agnostic. Roll20 is a virtual table top, there are some additional features such as automated roll functions, FoW and lighting which are not really possible on a real table top but for the most part Roll20 is a pretty good table top analog. Just like a physical table though it doesn't help you play any specific game. Dealing with system specific rules is something that the GM and players need to work out in their own way just like they would sitting around a physical table.

Ah, OK. If you at any time you find out that users would like to have to rule assistance, they could go and have a try at doing so with <a href="http://www.mas-wb.com/" rel="nofollow">http://www.mas-wb.com/</a> - or alternatively, we could work together to provide a useful rules definition language and integrate that into the Roll20 platform.